Newegg.com has the Antec SmartPower 2.0 SP-500 ATX12V 500W Power Supply for $39.99 shipped after rebate.

Pricegrabber Price : $71 ~ $87 Shipped

1. Newegg Price : $69.99
2. Rebate Price : -$30.00
Final Price : $39.99 Shipped After Rebate